Just to do (dia)magnetic levitation, you could put together 4 cubes of neodymium magnets, then cleave a very thin sheet of pyrolytic graphite and gently suspend

Just to do (dia)magnetic levitation, you could put together 4 cubes of neodymium magnets, then cleave a very thin sheet of pyrolytic graphite and gently suspend it on top of the cubes. If it's thin enough, it will float.